Move setting videoFrameSize into the main dispatch queue.
Move setting videoFrameSize into the main dispatch queue.

Bug: webrtc:9179
Change-Id: I46b19b67c267013d600dc754ba2bcf1ca9c038e6
Reviewed-on: https://webrtc-review.googlesource.com/71996
Reviewed-by: Zeke Chin <b40c442fc59af77f26e2fb72593b151432f56d17@webrtc.org>
Reviewed-by: Kári Helgason <79949f6d84ac41ff1f64c59fd5a554be5ff12a02@webrtc.org>
Commit-Queue: JT Teh <c1e8ac5bd77bc49d3333fdfaeab9e8fd7a5936da@webrtc.org>
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#23007}
TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc